Walls and Roof

Double-stud, dense-packed cellulose, with some loose-fill in roof, and some rigid foam under slab. Air sealing primarily at sheathing, with backup at drywall.

Subslab assembly

4" XPS (donated by Dow)

Subslab R-value 22.0
Slab edge assembly

2" XPS between slab and stem wall

Slab edge R-value 11.0
Foundation wall assembly

slab on grade

Above grade wall assembly

double-stud dense packed cellulose, 11.5" frame to frame

Above grade wall R-value 37.5
Flat attic assembly

small portion of flat ceiling (1.5 story construction) with 24" loose fill cellulose

Flat attic R-value 81.6
Cathedral ceiling assembly

2/3 of ceiling sloped with dense-packed cellulose in truss depth, average 27" (model assumed R value 79 with thermal bridging of trusses, and at thinnest location for worst-case scenario, though could be up to 102.6 nominal)

Cathedral ceiling R-value 80.0
Roof Assembly

all insulation in depth of trusses

Windows and Doors

Window Assembly:

Paradigm casements low-e with argon, tuned with high-solar-gain glass on south windows

Door Assembly:

Therma-Tru Smooth Star S601LE

Average window U-factor 0.32
Solar Heat Gain Coefficient 0.28
Visible Light Transmittance 0.53
Door U-Factor 0.19
Door Area 20 sq ft

Mechanical Systems

Space cooling - Manufacturer & Model same as above
Space heating - Manufacturer & Model Fujitsu AOU24RXFZH, ASU12RLF1 and 2 ASU7RLF1
Domestic hot water - Manufacturer & Model Geospring GEH80DFEJSR
Domestic hot water - capacity 80 gal
Domestic hot water - efficiency 3 kW
Ventilation - Manufacturer & Model Lunos e2 (3 pairs)
Lighting Manufacturer and Model
Lighting Efficiency

Envelope

Air Changes per hour, ACH50 1.40 ACH50
Air Changes per hour, CFM50